cbonner191
21.02.2021 •
Mathematics
4 farklı oyuncak 3 çocuğa, her çocuğa en az 1 oyuncak verilmesi koşuluyla kaç farklı biçimde dağıtılabilir? doğru cevap 36 , çözümünü anlatırsanız sevinirim
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Ответ:
k = n(n^2 +9n+1)
expand brackets
k = n^3 + 9n^2 + n
first subsitute 1 as n to see if the result is prime.
k = (1)^3 + 9(1)^2 + 1
k = 1 + 9 + 1
k = 11 (this number is prime)
then substitute 2
k = (2)^3 + 9 (2)^2 + 2
k = 8 + 9 (4) + 2
k = 36 + 10
k = 46 (THIS NUMBER IS NOT PRIME SO MO IS WRONG)